Roller-bit.



T. PATIN.

ROLLER BIT.

APPLICATHJN FILED SEPT. 5. 191a.

Patented June 3, 1919.

Fig.2.

INVENTOR. 7/Z4ddaua' Pain. 5 ATTORNEYS TI-IADDEUS PATIN, F WHITTIER, CALIFORNIA.

ROLLER-BIT.

Specification of Letters Patent;

Patented June 3, 1919.

Application filed September 6, 1918. Serial No. 252,959.

To all whom it may concern:

Be it known that I, THADDEUS PATIN, a

citizen of the United States, residing at.

- sists of the novel features herein shown, de-

scribed and claimed.

Figure 1 is a View showing the bottom of a well in section and showing a roller bit embodying the principles of my invent on in operation, parts of the bit construction being shown :in section.

Fig. 2 is an enlarged elevation of the bit on the same plane as Fig. 1, parts being shown in section.

Fig. 3 is a top plan view looking in the direction indicated by the arrow 3 in Fig. 2.

The bit head 1 is formed of the parts 2 and 3 meeting on the diainetrical vertical line 4 and secured together by the bolt 5 having a head 6 recessed into the side of the part 3, and a nut 7 recessed into the side of the part 2, the body of the bolt passlng diametrically through the parts 2 and 3 on a line at right angles to the line 4. The blt head 1 thus constructed is circular in plan and slightly tapered from top to bottom. A screw threaded nipple 8 extends upwardly from the center of the head 1, and water holes 9 and 10 extend downwardly from the upper face of the nipple 8 to the bottom of the head. The lower face 11 of the part 2 is flat and extends from the'lower end of the line 4 downwardly and outwardly at an angle of -15", and the lower face 12 of the part 3 is identical with the face 11. The cutting cone 13 fits against the face 11 and the cutting cone 14 fits against the face 12, said cones 13 and 14 bein right angle triangles in cross section. A earin o ening 15 is formed from the face 12 to t 1e ange 16, and a bearing opening 17 is formed from the periphery of the part 3 to the flange 16. The stem 18-extends from the axial center of the flat face 19 of the cutting cone 14. A hearing plate 20 fits against the face 12 and a similar bearing plate 21 is recessed into the face 19 and tapered bearing rollers 22 are placed between the plates 20 and 21. Bearing rollers 23 are placed in the bearing opening 15 around the stern 18. A pintle 24 extends through the flange 16. A ball bearing 25. is placed around the pintle 24 in the bearing opening 17. A screw threaded nipple 26 extends from the pintle 24 and aunt 27 is screwed upon the nipple 26 against the ball bearin construction 25. A housing plate 28 is fixe in position to cover the bearing opening.17,.'the plate 28 referablv. being em bedded into the perip ery of the part 3, so as to make the head 1 smooth. An annular packing 29 of asbestos, or the like, is recessed into the cone 14 from the face 19 around the bearing plate 21 and rollers 23, and the packing bears against the face 12. Grease openings 30 and 31 are formed from the upper end of the part 3 downwardly to the hearing opening 15 and these openings are of considerable len th and of considerable size to hold a considerable quantity of grease. The grease may be inserted downwardly into the openings 30 and 31 and pressed to flow around the stem 18 and pintle 24, and through the bearing plate 20 to the rollers 22, the opening through the bearing plate 20 being larger than the stem 18 to allow the rease to flow. Then plungers 32' are placed in the openings 30 and 31. Expansive coil springs 33 are attached to the plungers 32 and pressed downwardly into the openings against the plungers, the plungers pressing against the grease, and plugs 34 are screwed into the upper ends of the openings against the springs, there being wing handles 35 upon the plugs 34. As the cutting cone operates the grease will work around the parts and out tothe packing 29, and as the grease is used up the springs 33 will expand to'force the plungers 32 downwardly against the grease and continue the supply until the openings 30 and 31 are empty. In a like manner the cutting cone 1-3 is mounted with relation to the face 11 in the part the housing plate 36 corresponding to the housing plate 28 and the wing handles 37 and 38 controlling plugs in the openings 39 and 40, said openings 39 and 40 corresponding to the openings 30 and 31 A coupling 41 is screwed upon the nipple 8 and the pipe drill stem 42 is screwed into theupper end of the coupling 41. The drill stem 42 is rotated and operated by the machinery at the top of the well, so as to rotate the head 1 and cause the cutting cones 13 and 14 to cut the rock at the bottom of the hole 43.

The hit head 1 is slightly smaller than the well hole 43. The cutting coneslil and 11 will cut a hole slightly larger than the bit head 1, so that the water passing downwardly through the pipe stem 42 will pass through the holes 9'and 10 and wash the ground rock upwardly around the bit head 1 and upwardly around the pipe, stem 42.

The roller bit thus constructed is simple to make and o erate, easily taken to pieces for repair an reassembled and is strong and durable. The lubricating systems are well adapted to hold the grease and to hold a considerable supply of grease, so that the bit will operate for a considerable length of time without a new supply of grease.

I consider the matter of forming the stems 18 integral with the cutting cones, and placing the roller bearings between the cutting cones and the flat faces of the bit head, and around the stems 18 of great importance.

Various changes may be made without departing1 from the spirit of my invention as claime I claim:

1. In a roller bit, two half bit heads each having a flat inner face and a circular outer face, and an inclined flat lower face extending from the lower end of the fiat face downwardly and outwardly to the circular outer face, there being a bearing opening formed from the inclined flat lower face, a bearing opening formed from the circular outer face in line with the first bearing 0 ening, and a flange between the inner end of the two bearing openings; a bearing plate fitting the inclined flat lower face; bearing rollers fitting the bearing plate; a cutting cone; a second bearing plate recessed into the cutting cone and fitting the bearing rollers; a stem extending from the axial center of the cutting cone through the bearing plates into the first bearing opening; bearing rollers around the stem; a pintle extending from the stem through the flange; a ball bearing upon the pintle in the second bearing opening against the flange; a nipple extending from the, intle' and a nut upon the nip is against the ball bearing.

2. In a rol er blli,l3W0 half bit heads each having a flat inner face and a circular outer face, and an inclined fiat lower face ex tending from the lower end of the flat face downwardly and outwardl to the circular outer face, there being a caring opening formed from the inclined flat lower face, a bearing opening formed from the circular outer face in line with the first bearing opening, and a flange between the inner ends of the two bearing openings; a bearing plate fitting the inclined flat lower face; bearing rollers fitting the bearing plate; a cutting cone; a second bearing plate recessed into the cutting cone and fitting the bearing rollers; a stem extending from the axial center of the cuttin cone through the bearing plates into the rst bearing opening; hearing rollers around the stem; a pintle extending from the stem through the flange; a ball bearing upon the pintle in the second bearing opening against the flange; a nipple extending from the pintle; a nut upon the nipple against the ball bearing; the first bearing rollers being recessed into the out ting cone; and an annular packing recessed into the cutting cone around the bearing plates and engaging the inclined flat lower ace.

In testimony whereof I have signed my name to this specification.

THADDEUS PATIN. 

